JP2002304863A - Disk cartridge - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a disk cartridge that can easily be assembled. SOLUTION: The disk cartridge 1 is provided with a cartridge main body in which an opening is formed, a shutter fitted to the cartridge main body, a coil spring S1 that energizes the shutter, and a couple of lock means 4, 4 that lock both ends of the coil spring S1. The shutter is configured to be movable between a shut position at which the opening is shut and an open position at which the opening is opened. The one lock means 4 of a couple of the lock means 4, 4 is locked to the cartridge main body at movement of the shutter and the other lock means 4 is moved together with the shutter to extend the coil spring S1 thereby energizing the shutter in the closing position. A couple of the lock means 4, 4 are provided with a wall-like member 11 that is extended in a direction crossing with an elongating/contracting direction of the coil spring S1 so as to be intruded between adjacent windings at both ends of the coil spring S1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cartridge body for rotatably storing a disk-shaped recording medium, a shutter capable of opening and closing an opening formed in the cartridge body, and biasing the shutter toward a closed position. The present invention relates to a disk cartridge having a coil spring.

[0002]

2. Description of the Related Art As a disk cartridge of this kind,
A disk cartridge 51 shown in FIG. 14 is conventionally known. The disk cartridge 51 includes a disk D on which various types of recording data can be recorded, a cartridge main body 2 rotatably storing the disk D, a shutter 53 slidably mounted on the front side 2a of the cartridge main body 2, and a disk cartridge 51 described later. A spring S5 for urging the shutter 53 toward the closing position A, and locking pieces 54, 54 attached to the cartridge body 2 together with the shutter 53 are provided. In this case, the cartridge main body 2 includes an upper shell 6, a lower shell 7, and a lid member 8.
The upper shell 6 and the lower shell 7 are provided with an opening OP for allowing the recording / reproducing head of the recording / reproducing apparatus to approach the surface of the disk D when recording / reproducing various data on / from the disk D, and a rail for slidably mounting the shutter 53. 6
a and 7a are formed. The lid member 8 is
The rear side 2b side of the cartridge main body 2 is closed, and also functions as a disk tray for pulling out the disk D out of the cartridge main body 2.

On the other hand, a shutter 53 is provided with a pair of flat plate-like members 9 each having a rectangular shape with a size capable of closing the opening OP.
a, 9a, a connecting member 9b for connecting one end side of the plate-like members 9a, 9a, and a slider in which an engagement groove 15 for mounting a shutter 53 on rails 6a, 7a of the upper shell 6 and the lower shell 7 is formed. 9c (see FIG. 15) is integrally formed in a U-shaped cross section. The shutter 53 is attached to the cartridge main body 2 such that the cartridge main body 2 is sandwiched between the plate-shaped members 9a, 9a, and the connecting member 9b is located outside the front side 2a of the cartridge main body 2. Further, as shown in FIG. 13 (a), the shutter 53 has a closing position A where the connecting member 9b is located at the center of the front side 2a and the opening OP is closed by the plate-like members 9a, 9a. As shown in FIG.
Is located on the left end side (or right end side) of the front side 2a, and the front side 2a is opened between the opening position B where the opening OP is released by closing the opening OP by the plate-shaped members 9a, 9a. Is slid linearly along.

In this case, the shutter 53 slid to the opening position B is urged toward the closing position A by the restoring force of the spring S5 via the locking pieces 54, 54 locked at both ends of the spring S5. Is done. This spring S
As shown in FIG. 15, loop-shaped locking hooks S5b for locking the locking pieces 54 at both ends of a spring body S5a in which windings S, S. S5
b is formed. The locking piece 54 has a J-shaped hook 54a for hooking the locking hook S5b of the spring S5, and a hook 9a for engaging the locking piece 54 with the rails 6a and 7a together with the slider 9c of the shutter 53. Engagement grooves 12 are formed. As shown in FIG. 13 (a), when the shutter 53 is at the closed position A, the locking pieces 54, 54 are in contact with predetermined portions of the cartridge main body 2 at positions A1, A2, respectively. Placed in On the other hand, when the shutter 53 is slid to the opening position B as shown in FIG. 9B, one locking piece 54 comes into contact with the slider 9c of the shutter 53 and slides to the position B1 (or B2). Then, the state where the other locking piece 54 is disposed at the position A2 (or A1) while maintaining contact with a predetermined portion of the cartridge body 2 is maintained. As a result, the spring S5 is extended, and the locking piece 54 on the side slid to the position B1 (or B2) is moved to the position A by the restoring force of the spring S5.
1 (or A2), the shutter 5
3 is biased toward the closed position A.

At the time of assembling the disk cartridge 51, first, the spring S5 and the locking piece 54 are held in a hand, and as shown in FIG.
Is hooked on the hook 54a of the one locking piece 54. Similarly, the other locking hook S5b is connected to the other locking piece 54.
Hook 54a. Next, the locking pieces 54, 54 and the spring S5 in this state are mounted on the lower shell 7 so that the engagement groove 12 is engaged with the rail 7a. Subsequently, the upper shell 6 is put on the lower shell 7 so as to sandwich the lid member 8 on which the disk D is placed, and the upper shell 6 and the lower shell 7 are welded to each other in this state. Thereby, storage of the disc D in the cartridge body 2 and
The mounting of the integrated spring S5 and the locking pieces 54, 54 is completed. Next, the shutter 53 is mounted on the front side 2a of the cartridge body 2. In this case, the upper shell 6
The rails 6a and 7a are engaged with the engagement grooves 15 of the slider 9c by expanding the front side 2a side of the lower shell 7. Thus, the mounting of the shutter 53 is completed, and the disk cartridge 51 is completed.

[0006]

However, the conventional disk cartridge 51 has the following problems. That is, in the conventional disk cartridge 51, the hooks S5b, S5b are hooked on the hooks 54a, 54a, so that both ends of the spring S5 are connected to the locking pieces 54, 54a.
54. In this case, in the conventional disk cartridge 51, it is very difficult to automate the work of hooking the hook S5b on the hook 54a.
The worker manually hooks the locking hook S5b on the hook 54a. For this reason, there is a problem that the production efficiency is poor and it is difficult to reduce the manufacturing cost. Also,
In the conventional disk cartridge 51, when attaching the shutter 53 to the cartridge main body 2, the upper shell 6 and the lower shell 7 are expanded so that the rails 6a and 7a are engaged with the engaging grooves 15 of the slider 9c. Therefore, since it is difficult to attach the shutter 53 so that the locking pieces 54 do not come off from the rails 6a, 7a, there is also a problem that the production efficiency is poor and the production cost is difficult to reduce.

The present invention has been made in view of the above problems, and has as its main object to provide a disk cartridge which can be easily assembled.

[0008]

According to another aspect of the present invention, there is provided a disk cartridge in which a disc-shaped recording medium is rotatably accommodated and an opening for exposing a part of the disc-shaped recording medium. And a shutter attached to the cartridge body, a coil spring for urging the shutter, and a pair of locking means for locking both ends of the coil spring. Is configured to be movable between a closing position for closing the opening and an opening position for opening the opening, and one of the pair of locking means is configured such that when the shutter moves, one of the locking means is the cartridge body. And the other is moved with the shutter to extend the coil spring, so that the A disc cartridge for urging a shutter toward the closed position, wherein the pair of locking means intersects with the expansion and contraction direction of the coil spring so as to be able to enter between adjacent windings at the both ends of the coil spring. The wall-like members extending in the directions of In the present invention, the “movement” of the shutter includes a movement that draws a linear trajectory or a curved trajectory (for example, an arc), a slidable movement, and a sliding operation in accordance with guidance by a guide means such as a rail. Movement is included.

The disk cartridge according to claim 2 is the disk cartridge according to claim 1,
The coil spring is characterized in that both end portions are loosely wound so that the wall-shaped member can enter in a natural state.

According to a third aspect of the present invention, in the disk cartridge according to the first or second aspect, the wall-shaped member protrudes in a direction in which the coil spring extends and is provided on an end side of the adjacent winding. An engaging claw that can be engaged with the winding is formed.

Further, in the disk cartridge according to a fourth aspect of the present invention, in the disk cartridge according to any one of the first to third aspects, the wall member has a tapered chamfer or a round chamfer at a tip end thereof. It is characterized by having been given.

The disk cartridge according to claim 5 is the disk cartridge according to claim 1,
The coil spring is disposed between the pair of locking means and is expanded and contracted in accordance with the movement of the shutter; a pair of linear portions formed at both ends of the spring body; It is characterized by comprising a pair of locking spring portions formed at the tip of the linear portion and locked by each of the wall members.

The disk cartridge according to claim 6 is the disk cartridge according to claim 5,
A storage locking portion for storing and locking the locking spring portion of the coil spring is formed on a wall surface of the wall-shaped member on the extension direction side of the coil spring, and the storage locking portion includes An insertion groove defined to have a groove width that allows insertion of the linear portion in the coil spring and restricts detachment of the locking spring portion is formed.

The disk cartridge according to a seventh aspect of the present invention is the disk cartridge according to any one of the first to sixth aspects, wherein the pair of locking means are movably attached to the cartridge body, respectively. The main body is configured such that the openings are formed on both front and back surfaces thereof, and the shutter is attached to the cartridge main body so as to be movable toward each opening position located on both sides of the closed position, and the pair of the shutters is provided. When the shutter is moved from the closed position to the one opening position, one of the locking means is locked to the cartridge body, and the other moves together with the shutter to extend the coil spring. When the shutter is moved from the closed position to the other open position, Serial is other is engaged with the cartridge body, and the one which is characterized in that to extend the coil spring to move together with the shutter.

According to an eighth aspect of the present invention, in the disk cartridge according to any one of the first to seventh aspects, the shutter includes a shutter main body formed by connecting a pair of flat plate-shaped members; The shutter main body is separate from the shutter main body, the shutter main body is configured to be attachable to the cartridge main body, and the slider main body is configured to include a slider for moving one of the pair of locking means together with the shutter. It is characterized by the following.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the disk cartridge according to the present invention will be described below with reference to the accompanying drawings. The conventional disk cartridge 51
The same components as those described above are denoted by the same reference numerals, and redundant description will be omitted.

As shown in FIG. 1, the disk cartridge 1 includes a disk D, a cartridge body 2, a shutter 3,
Locking pieces 4 and 4 and spring (coil spring) S
1 is provided. The disk D corresponds to a disk-shaped recording medium in the present invention, and includes, for example, audio data, video data,
A double-sided recording type optical disk capable of recording image data, computer programs, various recording data, and the like is used. The cartridge body 2 includes an upper shell 6,
By combining the lower shell 7 and the lid member 8, a hollow box body capable of storing the disk D is formed. In this case, the upper shell 6 and the lower shell 7 are formed with an opening OP that allows a part of the disk D to be exposed, from the center to the vicinity of the front side 2a. Also,
On the front side 2a side of the upper shell 6 and the lower shell 7, rails (guide means) 6a, 7a for slidably attaching the locking pieces 4, 4 and a slider 3b described later are formed, respectively.

On the other hand, the shutter 3 includes a pair of flat members 9.
shutter body 3a comprising a, 9a and connecting member 9b
And a slider 3b slidably attached to the front side 2a of the cartridge body 2. In this case, as shown in FIG. 2, the slider 3b has an engaging groove 15 for attaching to the rails 6a and 7a, and a convex portion 1 for holding the locking pieces 4 and 4 when the disk cartridge 1 is assembled.
6, 16 (only one convex portion 16 is shown in the figure)
Are formed. The slider 3b is formed separately from the shutter main body 3a, and is integrated when the disk cartridge 1 is assembled to constitute the shutter 3, as described later. As shown in FIG. 13, the shutter 3 is located at the center of the cartridge body 2 on the front side 2 a side and closes the opening OP.
It is slidably disposed along the front side 2a between opening positions B, B, which are located on both left and right end sides of the opening a and open the opening OP.

The locking pieces 4 and 4 correspond to a pair of locking means in the present invention. As shown in FIG. 2, both ends of the spring S1 are locked together with the shutter 3 in front of the cartridge body 2 as shown in FIG. It is slidably attached to the side 2a.
As shown in the figure, the locking piece 4 has a base 4a guided by grooves (not shown) formed on the inner walls of the upper shell 6 and the lower shell 7, and a rear end of the base 4a. It is integrally formed with the located rear plate 4b. Further, as shown in FIG. 4, a storage portion 10 for storing one end of the spring S1 is formed at the upper end of the base 4a.
In this case, the storage portion 10 includes a front wall 11a functioning as a wall-shaped member for locking the spring S1 and a side wall 11a.
b, 11b and a bottom wall (not shown). The front wall 11a is provided with a spring S1 as shown in FIG.
Is extended in a direction orthogonal to the direction of expansion and contraction (the direction indicated by the arrow C in the figure). Further, the front wall 11a has a front end portion 11 for facilitating mounting of the spring S1.
c is chamfered in a tapered shape. The front end 11c of the front wall 11a is formed at a position lower than the front end 11d of the side wall 11b in the height direction of the back plate 4b. Further, the front wall 11a has a locking claw 11e projecting in the extension direction of the spring S1 on a surface where the winding S on the end side of the attached spring S1 is located.
Are formed.

On the other hand, as shown in FIG. 4, an engagement groove 1 for attaching to the rails 6a, 7a is formed in the back plate 4b.
2, 12 and a concave portion 13 in which the convex portion 16 of the slider 3b can be fitted. Also, at the upper end of the base 4a,
For the attached spring S1, the cartridge body 2
A cover piece 14 for avoiding unnecessary contact from the side is integrally attached. In this disk cartridge 1, workability is improved by forming a convex portion 16 on the slider 3b side and a concave portion 13 on the locking piece 4 side so that the end of the spring S is not caught when the spring S1 is mounted. Has been improved. Also, the spring S1
As shown in FIG. 4, the windings S, S... At the central portion are formed densely, and the windings S, S. Have been.

When the disc cartridge 1 is detached from the recording / reproducing apparatus, the shutter 3 is located at the closing position A as shown in FIG. At this time, the locking pieces 4 and 4 are arranged at positions A1 and A2, respectively, in a state of contacting a predetermined portion of the cartridge body 2. On the other hand, when the disc cartridge 1 is loaded in the recording / reproducing device, the shutter 3 is slid by the recording / reproducing device, as shown in FIG.
It is arranged at the opening position B. At this time, the locking pieces 4 and 4
One locking piece 4 contacts the slider 3b of the shutter 3 and slides to the position B1 (or position B2), and the other locking piece 4 contacts the predetermined portion of the cartridge body 2 at the position A2 ( Alternatively, the state arranged in A1) is maintained. As a result, the spring S1 extends, and the position B1
(Or the locking piece 4 on the side slid to the position B2)
Is moved to the position A1 (or A
As a result of trying to return to 2), the shutter 3 is closed
It is urged toward. Therefore, when the disk cartridge 1 is removed from the recording / reproducing apparatus, the shutter 3
Returns to the closing position A, and the openings OP, OP are closed by the plate-like members 9a, 9a. As a result, entry of dust through the opening OP and damage to the disc D are prevented.

Next, a method of assembling the disk cartridge 1 will be described with reference to the drawings.

First, the spring S is set using an assembling device.
Attach the locking pieces 4 and 4 to both ends of 1. In particular,
As shown in FIG. 4, first, the tip 1 of each front wall 11a is
Both ends of the spring S1 are positioned above 1c, and the spring S1 in this state is moved toward the locking piece 4 by jigs X and X (only one is shown). At this time, the spring S1 is connected to the front wall 1 as shown in FIG.
1a is the tip 1 of each of the side walls 11b, 11b.
Since it is located at a position lower than 1d, 11d, after being fitted between the respective front end portions 11d, 11d of the side walls 11b, 11d, it is guided and moved along the inner wall surfaces of the side walls 11b, 11b. Therefore, the winding S at the end of the spring S1 is not displaced in the left-right direction in FIG.
It is securely and easily mounted in the storage unit 10. At this time, the front wall 11a enters between the adjacent windings S, S at the end of the spring S1, and as shown in FIG. 3, the adjacent windings S, S sandwich the front wall 11a. Be placed. In this case, in the disc cartridge 1, both ends of the spring S 1 are formed to be loosely wound, and the front wall 1
Since the tip 11c of 1a is chamfered in a tapered shape, the front wall 11a smoothly enters between the windings S. Further, among the windings S, S arranged so as to sandwich the front wall 11a, the winding S on the end side is locked by the locking claw 11e, and as a result, the spring S1 facing upward in FIG.
Movement is regulated. Thereby, as shown in FIG.
The attachment of the locking piece 4 to the spring S1 is completed. Further, as shown in FIG. 7, when the spring S1 is mounted on the locking piece 4, the gap SP is provided between the lower surface of the spring S1 and the upper surface 14a of the cover piece 14. Unnecessary contact from the cartridge body 2 side with the
It is possible to reliably avoid contact with the cover piece 14 when the spring S1 expands and contracts. In FIGS. 4 and 5,
Although the state where the locking piece 4 is attached to one end of the spring S1 is illustrated, the locking piece 4 is also attached to the other end at the same time.

Next, as shown in FIG.
The slider 3b of the shutter 3 is mounted between the locking pieces 4 and 4 mounted on both ends of the shutter 3. Specifically, the protrusions 16, 16 of the slider 3 b are connected to the recesses 13, 1 of the locking pieces 4, 4.
Fit into 3. At this time, as a result of the spring S1 being slightly expanded, the locking pieces 4, 4 are pressed against the slider 3b by the restoring force. Therefore,
As a result, it is difficult for the protrusions 16, 16 to come off from the recesses 13, 13, so that the slider 3 b, the locking pieces 4, 4 and the spring S 1
Are integrated.

Next, the engaging grooves 12, 1 of the locking pieces 4, 4 are formed.
2 and the engagement groove 15 of the slider 3b are mounted on the lower shell 7 so as to engage with the rail 7a. Subsequently, after the upper shell 6 is put on the lower shell 7 so as to sandwich the lid member 8 on which the disk D is placed, the upper shell 6 and the lower shell 7 are welded to each other. Thereby, the storage of the disk D in the cartridge body 2 and the slider 3b
And the mounting of the locking pieces 4 and 4 is completed. Next, the shutter body 3a is mounted on the front side 2a side of the cartridge body 2. In this case, since the slider 3b is already attached to the cartridge main body 2 together with the locking pieces 4 and 4, when attaching the shutter main body 3a, unlike the conventional method of assembling the disk cartridge 51, the upper shell 6 and the lower shell 7 can be easily mounted without expanding the front side 2a side. Thus, the disk cartridge 1 is completed.

As described above, this disk cartridge 1
According to this, the spring S1 is extended by the front walls 11a, 11a extending in a direction orthogonal to the direction of expansion and contraction of the spring S1.
Of the front wall 11a in a direction perpendicular to the direction of expansion and contraction of the spring S1.
By simply moving the spring S1, the windings S at both ends of the spring S1 can be locked to the front wall 11a. For this reason,
Unlike the conventional disk cartridge 51 in which the locking hooks S5b and S5b of the spring S5 are hooked on the hooks 54a and 54a of the shutter 53, the spring S1 for urging the shutter 3 to the closing position A can be easily attached. . Also, because it is not a hook configuration,
As a result of the step of attaching the spring S1 being automated, the manufacturing cost of the disk cartridge 1 can be reduced. Furthermore, in this disk cartridge 1, the front wall 11a smoothly enters between the windings S, S when the spring S1 is mounted by chamfering the tip 11c of the front wall 11a in a tapered shape.
The spring S1 can be easily attached without abnormal deformation. In the disk cartridge 1, even if the spring S2 (see FIG. 9) in which all the windings S, S... Front wall 1
Since the tip 11c of 1a is chamfered in a tapered shape, the front wall 11a can smoothly enter between the windings S. In addition, the locking claw 1 is attached to the front wall 11a.
1e, the end winding S can be locked to the locking claw 11e.
1 can be reliably prevented from being detached.

Further, according to the disk cartridge 1, the locking pieces 4, 4 having the front wall 11a are formed separately from the shutter 3 and the cartridge body 2, and together with the shutter 3, the locking pieces 4, 4 are provided. 4 is slidably attached to the cartridge body 2, so that the locking piece 4 does not interfere with the sliding of the shutter 3, so that the opening position B of the shutter 3 is defined on both sides of the closing position A. Can be simply configured. Further, according to the disk cartridge 1, the shutter 3 is configured by separating the shutter body 3a and the slider 3b from each other, so that the slider 3b is attached before the upper shell 6 and the lower shell 7 are integrated by welding. Therefore, unlike the conventional shutter 53 in which the flat members 9a, 9a, the connecting member 9b, and the slider 9c are integrally formed, the mounting to the cartridge body 2 becomes very easy. Therefore, the manufacturing cost of the disk cartridge 1 can be reduced.

Next, another embodiment of the coil spring and the locking means according to the present invention will be described with reference to the drawings. Note that the same members in the disk cartridge 1 are denoted by the same reference numerals, and redundant description will be omitted.

As shown in FIG. 10, in the disk cartridge 1, the above-described spring S1 (or S1) is used.
2) Instead of the combination of the slider 3b and the locking pieces 4 and 4, a combination of the spring S3, the slider 23b and the locking pieces 24 and 24 can be attached to the cartridge body 2. In this case, the spring S3 includes a spring body S3a in which the windings S, S are closely wound, and linear portions S formed at both ends of the spring body S3a.
3b, S3b, and locking spring portions S3c, S3c formed at the tip of the linear portion S3b and tightly wound with, for example, a smaller diameter (the same diameter or a larger diameter) than the spring body S3a.
It is comprised including. In this case, the winding S on the end portion side of the spring body S3a and the winding S on the spring body S3a side of the locking spring portion S3c (that is, the windings S, S connected by the linear portion S3b). , Correspond to adjacent windings in the present invention. On the other hand, the locking piece 24 corresponds to a locking means in the present invention, and as shown in FIG. 11, a wall-shaped member 31 for locking the locking spring portion S3c and a locking spring portion S3c. The storage and locking portion 32 that stores and locks, and the projection 33 that fits into the recesses 36 and 36 (see FIG. 10) of the slider 23b are integrally formed. In this case, the storage locking portion 32
A spring S3 is formed on the wall surface of the wall-shaped member 31 on the extension direction side of the spring S3.
3 is formed with an insertion groove portion 32a defined to have a groove width that allows insertion of the straight portion S3b and restricts detachment of the locking spring portion S3c. Further, behind the insertion groove 32a, an insertion hole 32 communicating with the insertion groove 32a and having a hole diameter defined to have a hole diameter allowing the insertion of the locking spring portion S3c.
b is formed.

When attaching the spring S3 to the locking pieces 24, 24, the linear portion S3b is inserted into the insertion groove 32a.
Is inserted, and the locking spring portion S3c is inserted through the insertion hole 32b. Next, the locking spring portion S
3c is moved to the wall-like member 31 side. At this time, since the insertion groove portion 32a is defined to have a groove width for preventing the insertion of the locking spring portion S3c, the locking spring portion S3c is formed.
3c is stored in a state in which it abuts on the wall surface of the wall-shaped member 31 and is locked, whereby the spring S3 is attached to the locking piece 24. Similarly, the other locking spring portion S3c of the spring S3 is attached to the other locking piece 24. Next, as shown in FIG. 12, the slider 23b is attached between the locking pieces 24, 24 attached to both ends of the spring S3. Specifically, the protrusions 33 of the locking pieces 24 are fitted into the recesses 36 of the slider 23b. In this case, as a result of the spring S3 being slightly extended, the locking pieces 24, 24 are pressed against the slider 23b by the restoring force. Thereby, the slider 23b, the locking pieces 24, 24, and the spring S3 are integrated. Thereafter, the disk cartridge 1 is assembled in the same manner as in the above-described assembling method.

As described above, this disk cartridge 1
According to this, the locking spring portions S3c are formed at both ends of the spring S3 via the linear portions S3b, so that the locking pieces 24, 24 are attached to the spring S3 (or to the locking pieces 24, 24). Mounting of the spring S3) becomes extremely easy. Therefore, the manufacturing cost of the disk cartridge 1 can be reduced in the same manner as the combination of the spring S1 (or S2), the slider 3b, and the locking pieces 4, 4.

The present invention is not limited to the above embodiment of the present invention, but can be appropriately modified. For example, in the embodiment of the present invention, the opening positions B,
Although the example in which B is defined has been described, when the disc D is a single-sided recording type, the opening position B may be provided only on one of the left and right sides of the closing position A. In this case, the opening O is provided in only one of the upper shell 6 and the lower shell 7.
P may be formed. Further, in the case of this configuration, one of the pair of locking means in the present invention may be fixedly formed on the cartridge main body 2 (for example, formed integrally with the cartridge main body 2). Further, in the embodiment of the present invention, an example in which the front end portion 11c of the front wall 11a is chamfered in a tapered shape has been described. However, the present invention is not limited to this, and the front end portion 11c is chamfered so as to be round. Is also good. In addition, the shutter 3 is not limited to the configuration in which the shutter 3 is attached to the outside of the cartridge
The present invention can also be applied to a configuration in which the device is housed inside.

[0033]

As described above, according to the disk cartridge of the first aspect, the pair of locking means intersect with the direction of expansion and contraction of the coil spring so as to enter between the adjacent windings at both ends of the coil spring. By providing the wall-shaped members extending in the respective directions, the coil spring can be attached only by pressing the wall-shaped member in a direction intersecting with the expansion and contraction direction, so that hooks at both ends of the coil spring are hooked. It can be easily attached as compared with a conventional disk cartridge. As a result, the assembly cost can be reduced, and the manufacturing cost of the disk cartridge can be sufficiently reduced.

Further, according to the disk cartridge of the present invention, the coil windings are formed so that both ends of the coil spring are sparsely wound so that the wall-shaped member can enter in a natural state, so that adjacent windings are closely wound. As a result of the wall-shaped member entering smoothly during the assembly as compared with the coil spring, the coil spring can be easily attached while preventing deformation of the coil spring.

Further, according to the disk cartridge of the present invention, the wall-shaped member is formed with an engaging claw that protrudes in the direction of extension of the coil spring and that can be engaged with the end-side winding of the adjacent winding. Accordingly, the coil spring is hooked on the engaging claw, so that the detached coil spring can be reliably prevented from being attached.

According to the disk cartridge of the fourth aspect, the tip end of the wall-shaped member is chamfered so as to be tapered or rounded, so that a coil spring in which adjacent windings are closely wound is attached. Even so, as a result of the wall-shaped member entering smoothly, the coil spring can be easily attached while preventing deformation of the coil spring.

Further, according to the disk cartridge of the present invention, since the coil spring is constituted by the spring body, the pair of linear portions and the pair of locking spring portions, hooks at both ends of the coil spring are hooked. Compared to conventional disc cartridges,
Since the disk cartridge can be easily attached, the manufacturing cost of the disk cartridge can be further reduced.

Further, according to the disk cartridge of the present invention, since the storage locking portion in which the insertion groove is formed is formed on the wall surface of the wall-shaped member, the detachment of the coil spring in the mounted state is reliably avoided. can do.

Further, according to the disk cartridge of the present invention, the pair of locking means are movably attached to the cartridge main body, so that the shutter slides to the opening position defined on both sides of the closing position. Can easily be configured.

Further, according to the disk cartridge of the present invention, the shutter is constituted by a separate shutter body and a slider, respectively. The shutter can be easily mounted on the main body.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a disk cartridge 1 according to an embodiment of the present invention.

FIG. 2 shows a slider 3 of the disk cartridge 1.
b is an external perspective view of the locking pieces 4 and 4 and a spring S1.

FIG. 3 is a cross-sectional view showing a state in which locking pieces 4, 4 are attached to both ends of a spring S1.

FIG. 4 is an external perspective view for explaining a procedure when attaching a locking piece 4 to an end of a spring S1.

FIG. 5 is an external perspective view showing a state in which a locking piece 4 is attached to an end of a spring S1.

FIG. 6 is a front view of the locking piece 4 immediately before mounting the spring S1.

FIG. 7 is a front view of the locking piece 4 with the spring S1 mounted.

FIG. 8 is a front view showing a state where the slider 3b, the locking pieces 4, 4 and the spring S1 are integrated.

FIG. 9 is an external perspective view of a state in which locking pieces 4, 4 are attached to both ends of a spring S2.

FIG. 10 is an external perspective view of a slider 23b, locking pieces 24, 24, and a spring S3.

11 is an external perspective view of a locking piece 24. FIG.

FIG. 12 is a front view showing a state in which a slider 23b, locking pieces 24, 24 and a spring S3 are integrated.

13A and 13B are plan views of the disk cartridge 1 according to the embodiment of the present invention and a conventional disk cartridge 51, wherein FIG. 13A is a plan view of a state in which a shutter 3 (53) is located at a closing position A, (b) is a plan view showing a state where the shutter 3 (53) is slid to the opening position B.

FIG. 14 is an exploded perspective view of a conventional disk cartridge 51.

FIG. 15 is an external perspective view of a shutter 53, locking pieces 54, 54 and a spring S5 in the disk cartridge 51.

16 is a front view showing a state in which a hook S5b for locking a spring S5 is hooked on a hook 54a of a locking piece 54. FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Disc cartridge 2 Cartridge main body 3 Shutter 3a Shutter main body 3b, 23b Slider 4, 24 Locking piece 6 Upper shell 7 Lower shell 8 Lid member 9a Flat plate member 9b Connecting member 11a Front wall 11c Tip 11e Locking claw 12, 15 Engaging groove 31 Wall-shaped member 32 Storage locking part 32a Insertion groove part A Closed position B Open position D Disk OP Open part S Winding S1-S3 Spring S3a Spring body S3b Linear part S3c Locking spring part

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Masahiro Koshimi 1-1-13 Nihonbashi, Chuo-ku, Tokyo TDK Corporation (72) Inventor Kimitoshi Ito 1-13-1 Nihonbashi, Chuo-ku, Tokyo TDK Inside the company

Claims (8)

[Claims] 1. A cartridge body having a disc-shaped recording medium rotatably accommodated therein and having an opening for exposing a portion of the disc-shaped recording medium, a shutter attached to the cartridge body, and A coil spring for urging the shutter; and a pair of locking means for locking both ends of the coil spring. The shutter has a closing position for closing the opening, and an opening for opening the opening. The pair of locking means are configured such that when the shutter moves, one of the locking means is locked to the cartridge body, and the other moves together with the shutter to move the coil spring. A disc cartridge for urging the shutter toward the closing position by the coil spring by extending the disc cartridge; The pair of locking means each include a wall-shaped member extending in a direction intersecting the expansion and contraction direction of the coil spring so as to be able to enter between adjacent windings at the both end portions of the coil spring. Disc cartridge. 2. The two ends of the coil spring,
2. The disc cartridge according to claim 1, wherein the disc cartridge is formed so as to be loosely wound so that the wall member can enter in a natural state. 3. The wall-shaped member is formed with an engagement claw that protrudes in a direction in which the coil spring extends and that can be engaged with an end-side winding of the adjacent winding. The disk cartridge according to claim 1. 4. The disk cartridge according to claim 1, wherein the wall-shaped member has a tapered chamfer or a rounded chamfer at its tip. 5. A spring body disposed between the pair of locking means and extended and contracted in response to movement of the shutter, and a pair of linear portions formed at both ends of the spring body. 2. The disk cartridge according to claim 1, further comprising a pair of locking spring portions formed at the ends of the pair of linear portions and locked by the respective wall members. 6. A storage locking portion for storing and locking the locking spring portion of the coil spring is formed on a wall surface of the wall-shaped member on the extension direction side of the coil spring. The stop portion has an insertion groove defined to have a groove width that allows insertion of the linear portion of the coil spring and restricts detachment of the locking spring portion. The disk cartridge according to claim 5. 7. The pair of locking means are respectively movably attached to the cartridge body, the cartridge body is formed with the openings on both front and back surfaces thereof, and the shutter is closed When the shutter is moved from the closed position to one of the open positions, the pair of locking means is attached to the cartridge body so as to be movable toward each of the open positions located on both sides of the position. One is locked to the cartridge body, and the other moves with the shutter to extend the coil spring, and when the shutter is moved from the closed position to the other open position, the other is The coil spring is extended by being locked to the cartridge body and the one moving together with the shutter. 2. The method according to claim 1, wherein
7. The disc cartridge according to any one of items 1 to 6. 8. The shutter according to claim 1, wherein the shutter body is configured by connecting a pair of flat members, the shutter body is separate from the shutter body, and the shutter body is configured to be attachable to the cartridge body. 8. The disk cartridge according to claim 1, further comprising a slider for moving one of said pair of locking means together with said shutter.